Building a solid customer relationship comes in many ways.
Established by talking personally to the person
Chatting over the
messenger
Calling each other on the phone
It may involve personal questions and some facts about your customer that could help you know him or her better.

Most of the time, customers who ask lots of questions are the most clueless when it comes to the services you offer.
Creating a concrete bridge available to answer all the queries would develop a good interaction between you and your customers.

A constant communication with a client after a project could be made possible by means of feedback forms and surveys.
Whether the results are positive or negative, use these resources for your own advantage.

As the customers became your patrons, your business surely would become a hit to the crowd.
Not only you would gain quite a number of recommendations but you also gain the trust and loyalty of the people who are once doubtful of your capabilities.